Arrangement of the paper-pressing rollers of typewriting machines



H. F. E. BAESELER. 7

ARRANGEMENT OF THE PAPER PRESSING ROLLERS 0F TYPEWRITING MACHINES.APPLICATION FILED 001.12, 1920.

1,4;26,243.- PatentedAug. 15', 1922.

3 SHEETSSHEET l.

g fifg H. F. E. BAESELER. ARRANGEMENT OF THE PAPER PRESSING ROLLERS 0FTYPEWRITING MACHINES.

'APPLICATIQN FILED OCT. 12, I920.

' Patented Aug. 15, 1922.

3 SHEETS-SHEET 2.

A m ArA/ H. Fa E. BAES-ELER. ARRANGEMENT OF THE PAPER PRESSING ROLL-"ERS 0F TYPEWRITING MACHINES.

APPLICATION FILED 061112, 1920.

Paltent ed A 18- 15, 1922. a SHEETS-SHEET a.

i War-726:5

HEINRICH FRANZ EDMUND .BAESELER, oF nRnsnEiv, GER ANY, 'A-ssrGN'onToAKT.

GES. VORIVI SEIDEL. & NAUMANN, GERMANY.

OF DRESDE-N, GERMANY, AYGORIORATI QN OF ARRANGEMENT OF THEPAPER-YIR-ESSING ROLLERS-OE TYPEWBITING' MACHINES.

Specification of Letters Patent. Patented. Aug "15 1922'. Applicationfiled October 12, 1920. Serial in. 416,581," v

(GRANTED manna-rm: rnovxsrons on THE Aer or anon. a, 1921,41 s'rAn-n, 1,51

To all whom it may concern:

Be it known that HEINRIGH FRANZ E1)- MUND Biinsnnnn, director of acompany, a citizen of the German Republic, residing at Dresden,Schumannstr. 24, Germany, have invented certain new and usefulImprovements in an Arrangement of the Paper- Pressing Rollers ofTypewr-iting Machines (for which I have filed applications in GermanyMay 25, 1917, utility Patents 664,072, 664,073, and 664,074; in AustriaMay 24, 1919, Patent No. 85,613, andin Switzerland June 30, 1919, PatentvNo. 84,547), of which the following is a specification.

This invention relates to type writing machines, especially to therollers serving to press the paper sheet or thelayers of sheets againstthe impressioncylinder.

For the purpose of lifting these rollers from the impression cylinder,when a sheet or the layer of sheets to be written on is in sertedandadjusted, sleeves or'collars carrying lugs or stops are provided, whichsleeves are adjustably mounted on the axle upon which the bearing leversfor the pressing rollers are also loosely mounted, said sleeves beingarranged in such a manner, that. when the axle which carries the bearinglevers is rocked, the lugs carried by the bearing levers are caused toswingagainst the action of springs which serve to hold the rollers inengagement with the impression cylinder,

In order to obtain a uniform pressure of the rollers against theimpression cylinder, said pressure corresponding to the thickness of thelayers of paper and to the diameter of cylinders, which have beenalready ground off, the rollers are pressed againstthe impressioncylinder by means of springs, the

tension of which can be adjusted. These springs, which have one of theirends engaging with the bearing levers of the rollers of one side of theimpression. cylinder, have their opposite ends secured by means of. adjustable stops or lugs withleverswhich act in their turn upon thebearing levers for the rollers of the other side of the cylinder.

In order to retain the rollers in released position, a locking memberismoved by. the paper releasing lever into such av position, that itengageswith the lever which liftsthe rollers, saidlever also beingrocked by the releasing. lever into, release position, and locks saidlifting lever in this position. The

releasing lever actu ateslthelocking member by means, of a ,pinprojecting into'aslot of said member, the slot suitably being made ofsuch a width, that. the pin. has someplay at the returnmovement in orderto enable the lifting lever, which has been} oscillated slightly beyondthe locking position teen-Y gage-one end of. the locking'member.

The subject matter ofthe inventionjis illustrated i n the accompanyingdrawing ,1 in which". Y i i Fig. .1 is a perspectiveview of, the lefthand portion. T I

Fig. 2 a perspective view ofjtherighthand portion of the carriage ofatype'writing machine embodying my invention.,.

Fig. 3 is a perspective rear view, Fig. 4 a verticalcross section,

Fig. 5 a perspective detail view, in which the roller for pressing thepaperagainst the impression cylinder is shown in lifted or re leasedposition,

Figs. 6 and? are detail views different positions assumed by the lockingmember. 7

The impression cylinder 5 is mounted in a known manner in the cylinderframe which comprises the side parts 1 and the transverse. rods 2, 3 and4 (Figs; 1 andf 2).0n the transverse rod 4 bearings 6 are provided, inwhich an axle 7 1s mountedto rock. The

bearing levers 8 carrying theaxle 9 for the rollers 10 are also mountedto rock or turn on said axle 7. In addition to the levers 8, sleeves ocollars 11, 12 orthe like are i'nounte ed upon the axle? in such amanner, that they can be exactly adjusted and securedto.

said axle by means ot' the set. s'crews'l3; On

showi g the each ofthe sleeves 11 a lug or stop 1 and 4) isprovided,.which' acts upon a" pin 15 secured tothe lever '8." Inaccordance with the'adjustment' of the sleeve 11, upon the axle .7 thelevers 8are rocked. moreor less when the axle 7 is rocked andthe press-'ing rollers 10 are thuslifted for a corresponding distance fromtheimpression cylinder 5., On each of the sleeves o'r collars 12a lugorstop 16 is provided, which' p'roj'ects' through aslot in the rod .4 intothe path of a lug 21 ofthebearing lever 18' of the rear roller 19, saidbearing lever being arranged on the axle17; the lug.16 also causes arocking. movement of the '1ever18against the action of the spring 20, sothat, when the ingmember 33,s0 that axle 7 is rocked, the roller 19 islifted from the impression cylinder 5 simultaneously with the pressingrollers 10. The course of the bearing levers 8, 18 can be exactlyregulatedby the adjustment of the sleeves 11, 12 on the axle 7. Therotating movement of the axle 7 for the purpose of lifting the pressingrollers can be effected in the manner to be described further on.

The impression cylinder 5 is mounted upon the axle 22' and is secured inits bearings by a device not shown. At the rear side of thetransverserod l the arle 17 is mounted in the bearings 23 and on saidaxle the'bearing levers 18, which carry the axle 24 for the rearpressing roller 19, are arranged in such a manner, that they canloosely' rotate on'this axle, (Figs. 3 and a Furthermorelevers 25 aremounted to lock on the axle 17and to each of these levers one end ofspring 26 is connected, the other end of each of which springs beingsecured to one of the levers 8. The levers 25 each ca'rrya screw-bolt27, which can be fixed by a cheek-nut 26 and which abuts against anangle 28 provided on the lever 18. The spring 20 tends to move thelevers 8 and rollers 10 and, through the'mediumof the screw-bolt 27 andangle 28, the levers 18 and roller 19 uniformly against the im pressioncylinder 5. By the adjustment of the screw-bolt 27 the tension of thespring can be adjusted in accordance with the diameter of the impressioncylinder;

The releasing lever 29 is pivotally mounted on the pin 30 of the sidepart 1 of the cylinder frame and carries a pin 31 which engages in aneccentric slot 32 of the locking member 33, which is pivoted on the pin34 of the side plate of said frame. Gne edge of the lever 29 engageswith a bent extension 35 of a lever 36 formed in one piece with the axle7 or secured upon the same; accordingly the lever 29 actuates said lever36 and thereby also the axle 7 in the direction of the arrow (Fig. 2).

If the releasin lever 29 is turned in the direction ofthe Zrrow (Fig.2), it actuates the lever 36 rocks the axle 7, oscillates the lever 8and lifts the rollers 10 fromthe impression cylinder 5. Simultaneouslywith the rocking of the axle 7 the releasing lever 29 through the mediumof the pin 31 and slot 32 moves the locking member 33 into the positionshown in Fig. 6. At the release of the lever 29, which is moved slightlybeyond the locking position in order to allow the locking member 33 topass the bent extension, the lever 36 is moved slightly rearwardly bythe influence of the springs 20 acting upon the rollers, until theextension 35 .of said lever engages with the locl a mutual locking ofthe parts is efiected; The slot 32 is sufficiently wide that during theshort rearward movement the pin 31 can not act upon the locking member.3

The release of the locking member 33 is effected by the return movementof the re leasing lever 29 when the locking member 33 is restored to theposition shown in Fig. 2.

As the movement of the locking member in each direction is governed byits mechan ical connection with the lever 29 it is not necessary'toprovide a spring for said locking member. The arrangement of theremaining parts necessary for guiding the paper can be effected asdesired.

Having thus particularly described the nature of my invention, what 1claim as new and desire to secure by Letters Patent of the United Statesis:

1. In typewriting machine, a cylinder frame, an impression cylindermounted to rotate in said frame, a rock shaft carried by the frame, apair of bearing levers mounted to rock on said rock shaft, a rollerjournaled in said bearing levers and adapted to engage said impressioncylinder, a second pair of bearing levers carried by said frame, asecond roller journaled in the latter bearing levers and adapted toengage said impression' cylinder at a point on its periphery at adistance from said first-named roller, spring means tending to maintainsaid rollers in engagement with said impression cylinder and meanscarried by said rock shaft and engageable with one of each of said pairsof bearing levers to rock said levers and move said rollers out ofengagement with said impression cylinder when said rock shaft isactuated.

2. In a typewriting machine, a cylinder frame, an impression cylindermounted to rotate in said frame, a rock shaft mounted on said frame, apair of bearing levers mounted to rock on said rock shaft, a rollerjournaled in' said bearing levers and movable into engagement with saidimpression cylinder, a second pair of bearing levers pivoted to saidframe, a second roller journaled in said second pair of bearing leversand adapted to engage said impression cylinder at a point removed fromsaid firstnamed roller, an arm pivotally mounted on said frame adjacentone of said secondnamed pair of bearing levers, adjustable means carriedby said arm and engaging the bearing lever just mentioned, a springextending between said arm and one of the bearing levers carried by saidrook shaft, and means carried by said rock shaft and engageable with oneof the bearing levers of each of said rolls to rock said levers and movesaid rollers out of engagement with the impression cylinder when therock shaft is actuated.

3. In a'typewritingmachine embodying an impression cylinder and rollersfor pressing paper against the impression cylinder, means rock shaftmounted in said frame, a pair for releasing said rollers from engagement7 with the impression cylinder comprising a pair of rock shafts, a pairof bearing levers for one of said rollers mounted to rock on each ofsaid rock shafts, a spring tending to rock said rock shafts to bring therollers against the impression cylinder, a sleeve secured-t0 one of saidrock shafts,

and lugscarried by said sleeve engaging one of each of said pairs oflevers when said rock shaft is actuated. v

4. In a typewriting machine embodying an impression cylinder and rollersfor pressing paper against said cylinder and a frame in which saidcylinder and rollers are mounted,means for moving said rollers out ofengagement with said cylinder comprising a of bearing levers carryingone of said rollers and mounted to rock on said rock shaft, meanscarrying the other of said rollers rockably mounted on said frame,spring means connecting one of each of said pairs of levers and tendingto press said rolls against said cylinder,-a sleeve secured to said rockshaft, and lugs carried by said sleeve and engaging one of each of saidpairs of levers for moving said rolls out of engagement with saidcylinder when said rock shaft is actuated,

5. In a typewriting machine embodying and provided with adjustable meansengaging one of said levers, and a spring connecting said member and oneof said firstmentioned levers.

6. In a typewriting machine embodying an impression cylinder, a pair ofrolls for pressing paper against said cylinder and a' frame in whichsaidcylinder and rolls are mounted, means for moving said rolls out ofengagement with'said cylinder compris ing a rock shaft mounted in saidframe,

bearing levers for one. of saidrolls mount ed to rock onsaidrock shaft,a second pair of bearing levers for the otherof saidrolls rockablymounted on said frame, means secured to said rock shaft to engage androck one of eachof said pairs of bearing levers,

an arm secured to said rock shaft for actuating the same, and means forsecuring said arm against movement when said rock shaft is rocked'intoroller-releasing posi tion. i

7. Ina typewriting machine embodying .an impression cylinder, a pairofrolls cooperative therewith and a frame in which said cylinder androllers are mounted, means for movingsaid rollers out of'engagement withsaid cylinder comprising a rock shaft mounted inrsaid frame, a pairofbearing levers for oneof said rolls mounted to rock on said rockshaft, a second pair of bear: ing levers for the otherof said rollsrockably mounted on said frame, means secured to said rock shaft andadapted to engage and rock said levers to move said rolls away from saidcylinder when said rock shaftis actuated, an arm, secured to said rockshaft for actuating the latter, and means for se-f curing said; arm inthe roller release position, said means including a member pivot allysecured to the frame and adapted to engage one end of said arm andprovided with a slot, a finger lever mounted on said frame, and a pincarried by said finger and engaging said slot for actuating said'slottedmember.

, In testinionywhereof I have hereunto set my hand in presence of twosubscribing Witnesses.

HEINRICH FRANZ Witnesses HEINRICH GL' NER, WILHELM BLEsHEN.

EDMUND BAESELER.

